All categories

2 years ago

Emma had $2.40 to spend on seven pencils. After buying them she had $1.00. How much did each pencil cost?

Mathematics

2 answers:

OlgaM077 [116]2 years ago

8 0

Answer:

Each pencil costs 20 cents

Step-by-step explanation:

2.40 - 1 = 1.40

1.40/7 = 0.2

ludmilkaskok [199]2 years ago

3 0

Answer:

$0. 20

Step-by-step explanation:

emma had $2.40 but she spent $1.40 on 7 pencils

if she bought 7 pencils and had $1.00 left

so you would do $2.40 - $1.00 because she had $1.00 left after she bought the pencils.

the answer would be $1.40 because that is how much she spent and you divide that by 7 because she bought 7 pencils.

so 140 divided by 7 = 20

but since its $ dollars you put it into cents leaving you with the answer

$)0.20

You might be interested in

in an election about 500,000 people voted in all what could be the exact number of people who voted in the election

salantis [7]

It can be any number from 450000 to 549999. This is due to the fact that when figures like this are reported they are either rounded up or down.

6 0

3 years ago

The number of peanuts in bags is normally distributed with a mean of 184.7 peanuts

ioda

Standard deviation = 3.3

The data point = 178

The mean = 184.7

<h2>Further Explanation</h2>

To calculate the Z-score of a bag containing 178 peanuts, we should use the formula to calculating a z-score.

The formula for calculating a Z-score is as follows

$z = \frac{data Point - Mean}{Standard Deviation}$

This also implies

$z = \frac{178 - 184.7}{3.3}$

$Z= -2.03$

therefore, the correct answer is -2.03

A z-score determine the number of standard deviation from the mean a data point is.

some important factors about z-score include:

if it is a positive z-score, it indicates the data point is above average
if it is a negative Z-score, it indicates the data point is below average
if the z-score is close to 0, it then means the data point is close to average
if the z-score is above 3 or below -3, it is considered to be unusual

Learn More about Z-score at:

brainly.com/question/12876715

#learnwithbrainly

8 0

2 years ago

a boat traveled 14 miles per hour downstream. the trip upstream was at a speed of 10 miles per hour. what is the speed of the bo

MariettaO [177]

Answer:

(im not sure what the first question is asking me)

Speed of the current is 2 miles per hour

Step-by-step explanation:

The reason the current is 2 miles per hour is because it when going down stream they were going 14 miles per hour, going upstream they went 10. The difference is 4mph. So if the current pushes you 2mph when going down stream and holds you 2 mph when going up, the constant speed is 12mph then you add and subtract 2 becuase of the two directions youre traveling. hence 10mph and 14mph.

7 0

2 years ago

<img src="https://tex.z-dn.net/?f=%20%5Cint%20%5Cfrac%7Bdx%7D%7Bxln%5E%7Bp%7Dx%20%7D" id="TexFormula1" title=" \int \frac{dx}{xl

Eva8 [605]

Substitute $u=\ln x$ , so that $\mathrm du=\dfrac{\mathrm dx}x$ . The integral is then equivalent to

$\displaystyle\int\frac{\mathrm dx}{x\ln^px}=\int\frac{\mathrm du}{u^p}=\begin{cases}\dfrac{u^{p+1}}{p+1}+C&\text{for }p\neq1\\\\\ln|u|+C&\text{for }p=1\end{cases}$

Then transforming back to $x$ gives

$\displaystyle\int\frac{\mathrm dx}{x\ln^px}=\begin{cases}\dfrac{\ln^{p+1}x}{p+1}+C&\text{for }p\neq1\\\\\ln|\ln x|+C&\text{for }p=1\end{cases}$

4 0

3 years ago

Estimate the area of a living room that measures 10.6 ft x 9.28 ft

Mariana [72]

We have to multiply those measurements to get the area of a living room
10.6 ft * 9.28 ft
98.368 ft^2

5 0

3 years ago

Read 2 more answers